In Testing, how to setup self-approval for STD POs?

Hi Everyone,

I need to perform a simple testing in PO module in our testing environment and I need to enter a PO and approve it.  A few years back I did some similar work and I could self approve the PO I entered.  However, I forgot what I did by then.  So when I setup the docuement type/STD PO and checked 'owner can approve check box', it still needs to be approved by someone else.

Please advise what else I need to set so that when I create a PO, it can be approved by myself.  I am using Apps 11.5.10.